Valve-actuating mechanism for internal-combustion engines.



K. STEINBECKER.

VALVE AGTUATING MECHANISM FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED DEO.18,1911.

Patented July 8, 1913.

Hisoqttorng.

Fig.2.

Witnes ses:

TED STATES PATEnT cur os.

KARL STEINBEQKER, or'cH nLo'rTnNBUaG, GERMANY, AssIeNon'ro GENERALELECTRIC COMPANY, A CORPORATION or NEW YORK.

Specification of Letters Patent.

Patented July 8, 1913.

. Application filed December is, 1911. Serial No. 660,396. g

To all whom it may concern:

Be it known that I, KARL STEINBECKER, a

subject of the King of Prussia, residing at Oharlottenburg, Germany,have invented certain new and useful Improvements in Valve-ActuatingMechanism for Internal- Combustion Engines, of which the following isa'specification.

The present invention relates to valve actuating mechanism for internalcombustion engines and more especially to the actuation of valves in oilengines working on the so called constant pressure principle forcontrolling the admission of fuel to the eyl-- inders.

For consideration of what I believe to be novel and my invention,attention is directed to the accompanying description and claimsappended thereto.

In the accompanying drawing which illustrates one of the embodiments ofmy invention, Figure 1 is a vertical section of a valve mechanism, Fig.2 is a cross-section of the same and Fig. 3 is a velocity diagram of'a.

machine part for actuating the valve.

1 indicates a bod of any suitable construction which is a apted to bebolted to a suitable part of the engine, and is provided I with acentral opening to receive a valve 2. The valve is provided with apiston 3 that is screw-threaded to the valve stem and is adjustablethereon. The periphery of the piston makes a sliding fit with the boreof the body and therefore acts as a guide for the valve. The iston isprovided with a series of longitu inally extending holes- 4 that servewhen the valve is closed to balsage 9 is provided, that communicateswith the central chamber Send the space above the piston.

Surroundin the istonand situated be tween the bee. 7 an a shoulderformed on the body is a compression spring-10'. This sprin tends at alltimes to raise the valve, but t e pressure distribution is such thatwhen the valve is seated there is a preponderance of pressure tending tohold the valve against its seat. I have shown a spring that tends toopen the valve but obviously any equivalent device such as an unbalancedpiston may be employed. The piston 6 is covered by a screw-threaded cap11. I

12 indicates a conduit carrying fluid under pressure that is seated in asleeve 13, the

latter having a conical end that engages a The valve 2 is conical andhas a removable seat 15, that has a conical surface to receive thevalve. Extendin from the valve is a conduit 16 through w ich fluidpasses from the conduit 12 subject to the control of the valve.

In order to move the valve an actuator is provided, comprisin arectangular yoke 17 located in the chem er 8 that is provided with atrunnion 18, and a spindle 19, the'latter being mounted in ascrew-threaded plug 20. The diameter of this plug is slightly greaterthan the width of the yoke so that when the plug is removed, the yokecan be pulled out end-wise. On the end of the spindle 19 is a crank 21,that is actuated by any suitable means, such for example as theconnecting rod 22. 7

From Fig. 1 it will be seen that the thickness of the left-hand side ofthe yoke 17 is less than the distance between the lower end of the iston6 and the upper end of the piston 3. This arrangement forms a lost-.motion device or connection, whereby the yoke and crank and the partsassociated therewith can have a certain limited movement withoutaffecting the valve. Assuming that it is esired to open osition of thethe valve, the yoke 17 is turned in a clockwise direction, which firsttakes up the lost motion, and then raises the valve by a slight amount.As soon as this happens, the valve is balanced as to fluid pressure, butis unbalanced'due to the action of the spring. 10. This spring thenmoves the valve upward until the p'iston'3 strikes the underslde of theyoke. Further movement of the yoke .in the same direction will permitthe valve .to open to a greater extent. The closing of the valve isaccomplished by moving the yoke in ananti-clockwise direction.

In Fig. 3' is shown a portion of a velocity diagram of a machine partfor moving the valve actuator, 2'. e. the yoke 17., To the wrist pinon'the crank is connected a connecting rod 22or equivalent device, andit is to the means for moving the crank that the diagram relates, Thisrod may be reciprocated by a crank pin, by an eccentric, cam, 01'' otherdevice capable of rotating in either direction at the will of theoperator. (in

the diagram theportion from 23 to 24 indicates the interval when theyoke is taking up lost-motion, and the portion 24 to 25 the openingandclosing of the valve. This is assuming a direction ofmovement of themachine part as indicated by the fullline arrow. q On the other hand, ifthe machine part moves the opposite direction indi- '7 Thearrangemeiffishown and described is i very advantageous because itpermits of the use of a single external actuating means which may bedrlven forward or backward, whereas mother valve arrangements heretoforeused for'the purpose, two external de vices acting in alternation on thevalve have been found necessary. It is -.further advantageous because itpermits of. accurately moving'the valve, thereby insuring the ad missionof the proper amount of fuel to the engine cylinder. I I

In accordance'with the provisions of the patent statutes, I havedescribed the principle of operation of my invention, together with theapparatus which I now consider to represent the best embodiment thereof;but I desire to have it understood that the apparatus show'n is onlyillustrative, and that" the invention can be carried out by other means;

From the foregoing it will be clear 7 What I claim as new and desire'tosecure by Letters Patent-ofthe United States, is

1. In a device of the character described, the combination of a body, afluid pressure seated valve located there-in, an actuator one end ofwhich extends into the fluid space and acts through lost-motion on thevalve, and

a means-operated by a machine part for? 0 moving the actuator.

2. In a device of the character described,

the combination of a body, a valve located therein which is held againstits seat by fluid pressure, a piston for said valve, a pivotallysupported actuator one end of which extends into the fluid space andacts on said piston through lost-motion, and a crank mounted on theactuator and located outside of the body. I

3. In a device of the character described, the combination of a body, avalve located therein which is held against its seat by fluid pressure,a pivotally sup'portedactuator that acts on the valve throughlost-motion, a

means that takes up the'lost-motion as soon as the valve is raised fromits seat, and

means external to the valve for moving the actuator forward andbackward.

if. In a device ofthe character described,

thecombination of a body, a valve located thereinwhich is held againstits seat by fluid pressure and is balanced as to fluid pressurewhenopen, a means that tends to open the 'valve, an oscillating actuatorthat acts on the valve through lostotion in opening it and acts directlyon t e valve in closing it, ,and means for moving the actuator.

5. In a device of the character described,

- the combination of a body, a valve located therein having two-pistons,a' yoke located. between the pistons'which is of less depth than thespace between them, a spring. that acts to open the valve, and a crankfor moving the yoke.

6. In a device of the character described. the combination of a body, avalve located therein and provided with two pistons, said valve andvpistons being slightly unbalanced when the valv'eis closed and balancedas to ator that extends between the pistonsand acts thereon through alost-motion, and means-for moving the actuator.

".110 fluid pressure when'i't' is open, a meansthat tends at all timesto open' the valve, an actu- 7. In a device of the character described,

the'combination of a body,'a valve, a pair of pistons mounted on thevalve stem and Y acting as guides for the valve, said pistdns beingsubstantially balanced as to fluid pressure and separated by a space, ayoke through whichthe valve stem extends, said yoke being locatedbetween the pistons and acting thereon through lostmotion, a springtending to open the valve which takes up the through lost-motion, and aspring that takes 10 lost-motion in one direction when the valve up thelost-motion in 'one direction as soon is raised from its seat, and ameans external as the valve is lifted from its seat. to the body foroscillating the yoke. In Witness whereof, I have hereunto set 8. In adevice of the character described, my hand this first day of December,1911.

'the combination of a body, a valve therein, KARLSTEIN BECKER.

pistons for balancing the valve when ofien Witnesses: and for holding itagalnst ltS seat w en HENRY HAsrER, closed, an actuator that acts on thevalve WOLDEMAR HAUPT.

